JP3219362B2 - Pump sprayer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fine atomizer having a reciprocating hollow piston stem, on which a plunger actuated by a finger pressure is mounted, to pump a liquid, using a rotary mechanism of a known type. The liquid is rotated or swirled at a predetermined speed to obtain the effluent through the discharge orifice as a fine spray having a predetermined spray cone.

More specifically, the present invention divides a part of the liquid flowing from the liquid discharge passage of the hollow piston stem to the rotation mechanism, cancels a part of the rotation speed, and converts the spray into a narrower spray. The present invention relates to a means for forming a second liquid flow path generated as a cone. The second liquid flow path may be selectively opened and closed to adjust the size of the spray cone.

[0003]

2. Description of the Related Art As a typical example of a known pump type sprayer, a liquid is imparted with rotation and swirl at a predetermined speed and is ejected from a discharge orifice to form a divergent spray having a predetermined size into the atmosphere. Some include a rotating mechanism that generates a fine spray that diffuses in the form of a cone. In order to achieve such an object, the orifice cup includes a rotating chamber concentric with the discharge orifice, and is formed so that a tangential flow path for liquid communicates with the rotating chamber. A vertical flow path leading to the tangential flow path is formed between a post or probe and the peripheral orifice cup to form a flow path from the liquid discharge passage of the hollow piston stem. The orifice cup and probe are mounted in a plunger head associated with the hollow piston stem, and the hollow piston stem reciprocates by manually depressing the plunger head.

[0004]

In order to adapt to a particular application, a narrower spray cone is formed using the existing rotary mechanism structure, ie, the spray area on the target to be wetted by the pumping action is reduced. It is preferable to be able to provide a narrower spray cone with a smaller outward expansion so that it can be reduced.

In addition, the size of the spray cone can be selectively selected in a simple and efficient manner using existing spray mechanisms without increasing the complexity of the structure and without the need for additional molded parts. It would be beneficial to be able to change it.

It is an object of the present invention to provide a narrow and narrow spray cone having a smaller divergence compared to conventional sprayers, in a simple and effective manner, namely the tangential velocity applied to the liquid at the discharge orifice. It is an object of the present invention to provide an improved fine atomizer which can be generated by canceling a part.

[0007]

SUMMARY OF THE INVENTION To achieve the above object, the present invention provides a single liquid discharge passage (16) which reciprocates within a container closure (30) and through which liquid passes during pumping. A plunger head (1) comprising a formed hollow piston stem (12) and a probe (18) mounted on the hollow piston stem (16) and extending laterally from the hollow piston stem (12).
4) and a nozzle cup (19) surrounding the probe (18), the nozzle cup (19) to be discharged in communication with the discharge orifice (21) and the discharge orifice (21). A rotating chamber (23) for imparting rotation to the liquid at a predetermined speed such that the liquid is discharged through the discharge orifice (21) as a fine spray having a spray cone of a predetermined outwardly expanding shape. )
Means comprising: the plunger head (14).
And the nozzle cap (19), a flow path (1) forming a first liquid flow path extending from the liquid discharge path (16) to the discharge orifice (21) via the rotation applying means.
7, 22, 24, 25), wherein the probe (18) is connected to the single liquid discharge passage (1).
6) and a through-hole (26) forming a second liquid flow path that directly connects the rotation chamber (23), and a part of the liquid from the single liquid discharge passage (16) is transferred to the second A pump type sprayer characterized in that the flow is divided into two liquid flow paths and the predetermined rotational speed is canceled to generate a spray cone narrower than the predetermined spray cone.

According to another embodiment of the present invention, a hollow piston stem which can reciprocate in a container closure and has a liquid discharge passage formed therein, a liquid spray means provided at an upper end of the hollow piston stem, A spinner probe having a first liquid flow path extending from a discharge passage to the spraying means, comprising a plunger head rotatable around the hollow piston stem, wherein the spraying means has a through-hole terminating in the hollow piston stem. And wherein the hollow piston stem has at least one opening communicating with the through-hole, wherein rotation of the plunger head about the hollow piston stem causes the through-hole and the opening to be misaligned. When the liquid comes, the liquid is guided from the liquid discharge passage to the liquid spray means only through the first liquid flow path, and has a predetermined rotation speed. When a liquid spray is generated and comes to a position corresponding to the through hole and the opening, the liquid is guided from the liquid discharge passage to the liquid spray means through both the liquid flow paths, and is compared with the predetermined speed. This is a pump type sprayer that generates a narrow liquid spray at a low rotation speed.

[0009] A second liquid that directly communicates a through hole in a spinner probe of a conventional acupressure atomizer and a liquid discharge passage of the hollow piston stem and a rotation chamber through an opening provided in the hollow piston stem. Set the flow path. When the liquid from the liquid discharge passage of the hollow piston stem is caused to flow by a normal method using only the first liquid flow path, a swirl having a predetermined rotation speed is generated in the rotating chamber, and a predetermined conical spray is formed. Is discharged from the orifice. At this time, a part of the liquid is diverted from the discharge passage to the second liquid flow path to cancel a part of the vortex velocity in the rotating chamber. From a relatively narrow, divergent spray cone.

That is, when the plunger head is rotated around the piston stem at a position where the through hole of the probe does not coincide with the opening of the hollow piston stem, the liquid is guided only through the first liquid flow path. A standard fine spray at a predetermined rotational speed is generated, but the liquid from the liquid discharge passage is passed through both the first and second liquid flow paths by matching the through hole of the probe with the opening of the hollow piston stem. If guided, a relatively narrow spray column whose rotation has been reduced can be generated.

When the interlocking means is provided between the hollow piston stem of the pump type sprayer and the container closure, rotation of the piston stem accompanying rotation of the plunger head can be prevented.

The interlocking stopping means provided between the hollow piston stem and the plunger head can control the rotation of the plunger head to a matching position and a non-matching position.

Further, if a limit stop device is provided on the plunger head or the container closure, it is possible to control the spray amount of the sprayer by limiting the reciprocating movement of the hollow piston stem.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. In the respective drawings, the same reference numerals indicate the same members. In FIG. 1, reference numeral 10 denotes a pump type sprayer. The pump type sprayer 10 is a container closure 11 for attaching to a container (not shown) of a liquid product to be sprayed by a pumping operation.
Is provided.

[0015] The hollow piston stem 12 of the pump type sprayer 10 is provided with a conical portion 13 of the container closure 11.
Extending downward through a central opening in the pump cylinder (not shown) and reciprocating in a standard manner. A plunger head 14 is mounted on the upper end of the hollow piston stem 12, and downward finger pressure applied to the finger pad 15 of the plunger head causes the hollow piston stem to reciprocate through the plunger head.

The hollow piston stem 12 has a single liquid discharge passage 16 at its upper end communicating with a lateral passage 17 in the plunger head 14.

The plunger head 14 is provided with a laterally extending spinner probe 18 having a concentric discharge orifice 21 surrounded by an orifice cup 19.

On the inner front surface of the orifice cup 19,
A well-known type of rotation mechanism is provided comprising a plurality of tangential flow paths 22 (one shown in FIG. 1) terminating in a rotation chamber 23 which forms a rotation or a spiral at its downstream end. A vertical channel 24 formed between the orifice cup 19 and the probe 18
The first liquid flow path is formed so as to communicate with the tangential flow path 22 and to communicate with the liquid discharge path 16 together with the annular flow path 25 and the lateral flow path 17. The foregoing structure of the rotation mechanism and first liquid flow path 25 is described in further detail in U.S. Pat. No. 4,074,861.

During the pumping operation, the liquid is supplied to the liquid discharge passage 1
6 and the first liquid flow path, a spiral or rotation is applied to the liquid in the rotating chamber at a predetermined speed, so that the spiral rotating fine particles are converted into a spray cone or a spray column having a predetermined cone size in the atmosphere. It is discharged as fine spray through a rotation mechanism discharged from the discharge orifice.

According to the present invention, a part of the rotational speed can be canceled to generate a narrower spray cone. In this case, a through hole 26 is provided in the probe 18 so as to extend from the downstream end of the tangential flow path 22 of the rotating chamber 23 and end with the hollow piston stem 12.
2, at least one opening 27 is formed as shown in FIG. 1 and FIG. 5, which constitutes a second liquid flow path which coincides with the through hole 26 and communicates with the liquid discharge passage 16. . .

During the pumping operation of the plunger head 14 by reciprocating movement of the plunger head 14 relative to the hollow piston stem 12 shown in FIGS. 1 and 5, liquid passes through the liquid discharge passage 16 of the hollow piston stem 12 and to the first position. The liquid is discharged from the discharge orifice 21 through the flow paths 17, 25, and 24 constituting the liquid flow path. During such a pumping operation, a part of the liquid is diverted from the liquid discharge passage 16 to the openings 27 and 26 constituting the second liquid flow path, thereby canceling a part of the tangential velocity generated in the rotating chamber 23. Thus, the liquid can be discharged through the orifice 21 as a conical spray having a smaller width than the size of the spray cone generated by pumping the liquid through the liquid discharge passage 16 and the first liquid flow path only.

The plunger head 14 is connected to the through hole 26
5 is rotated around the hollow piston stem 12 from the position in FIG. 5 where the opening 27 matches the opening 26 to the position in FIG. 6 where the opening 27 does not match the second liquid flow path. The flow of some liquid passing through is closed, so that the discharge of liquid is limited only to said first liquid flow path and the size of a standard cone formed by the rotational speed imparted to the liquid by said tangential flow path Conical spray occurs.

In order to prevent the rotation of the hollow piston stem 12 with the rotation of the plunger head 14, the hollow piston stem 12 is formed on a central sleeve 30 which depends from the crest 13 of the container closure 11. One or more (three are shown in FIG. 3) outer vertical ribs 28 having a predetermined shape that mesh with the vertical groove 29 having a different shape are provided.

A limit stop means 35 is provided to limit the relative rotation of the plunger head (14) between the positions shown in FIGS. Such a limit stop means 35 forms a lug 31 which extends evenly radially inward from the wall 32 of the inner skirt 33 of the plunger head 14 and forms a lug 31 on the rib 28 of the hollow piston stem 14. The upper end is brought into contact with one side surface of the lug 31 at the position shown in FIG. 5, and the other side surface of the lug 31 is brought into contact at the rotational position of the plunger head 14 shown in FIG.

In the embodiment of the present invention, only the opening 27 is aligned with or removed from the through-hole 26 by the rotation of the plunger head 14, but the other openings 27 A and 27 B are connected to the stem 12.
It should be noted that it is located at the upper end of the. The openings 27, 27A and 27B are arranged at uniform intervals.
Further, by disposing the openings 27A and 27B, the assembly of the plunger head 14 and the hollow piston stem 12 can be easily performed without the necessity of indexing. In this way, by using three openings 27, three lugs 31, and three ribs 28, the plunger head 14 can be placed in the position shown in FIG. It can be oriented first without the need for indexing.

As shown in FIG. 7, each opening 27 can be in the form of an open cutout having spaced parallel side edges. Otherwise, an opening 33 is provided at the upper end of the plunger head and an opening 33 having an inclined bottom wall 34 as shown in FIG. The opening may be performed. . Thus, in the embodiment of FIG.
The liquid flow path of FIG. 5 is completely used between the position where the liquid flow path is completely closed and the position where the liquid flow path is gradually opened, and the position of FIG. The state of the spray cone can be varied within the range achieved by the relative rotation of the plunger head 14 between them.

Another feature according to the present invention is that the amount of spray coming out of the spray orifice can be measured by limiting the reciprocating movement of the hollow piston stem 12. For this reason, the hanging leg 35 is connected to the skirt 33 to the top 1 of the closure 11.
3 on the upright legs 36. When the depending leg 35 is oriented to axially coincide with the upright leg 36, the upright leg 36 bears against and supports the plunger head at the end of downward movement of the plunger head, thereby providing a piston. The reciprocating motion of the sprayer is limited, and the discharge amount from the sprayer can be measured. If only the depending legs 35 are provided, they merely contact the crest 13 of the container closure and limit the downward movement of the plunger head 14 and the hollow piston stem. Also, the upright legs 3
When only the plunger head 6 is disposed, it is in contact with the lower surface of the sleeve 33 of the plunger head.
It only stops the downward movement of 4 and hollow piston stem 12.

Obviously, various other modifications and variations of the present invention are possible in light of the above teachings. For example, a rotating mechanism specifically described herein may be provided within the scope of the present invention. Then, other means such as the ribs and the grooves 28 and 29 can be provided so as not to rotate the stem upon rotation of the plunger.

[0029]

As described above, according to the present invention, it is possible to adjust the size of the spray cone and the amount of spray using the existing spray mechanism, to complicate the structure, and to add new parts. It can be done without.

[Brief description of the drawings]

FIG. 1 is a partial longitudinal sectional view of a fine atomizer embodying the present invention.

FIG. 2 is a partial longitudinal sectional view of the improved hollow piston stem of FIG. 1;

FIG. 3 is a sectional view taken substantially along the line 3-3 in FIG. 1;

FIG. 4 is a sectional view taken generally along the lines 4-4 of FIG. 1;

FIG. 5 is a cross-sectional view taken substantially along the line 5-5 in FIG. 1;

FIG. 6 is a sectional view similar to FIG. 5, showing the plunger head rotating relative to the hollow piston stem;

FIG. 7 is a partial view of the upper end of a hollow piston stem showing one embodiment of an opening provided in the stem.

FIG. 8 is a view similar to FIG. 7, showing another embodiment of the opening provided at the upper end of the hollow piston stem.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Pump type sprayer 11 Container closure 12 Hollow piston stem 13 Circular top part 14 Plunger head 15 Finger pad 16 Liquid discharge passage 17 Horizontal flow path 18 Spinner probe 19 Orifice cup 21 Discharge orifice 22 Tangential flow path 23 Center rotation / vortex chamber 24 Vertical Flow path 25 Annular flow path 26 Through hole 27 Opening 27A Opening 27B Opening 28 Outer vertical rib 29 Vertical groove 30 Central sleeve 31 Lug 32 Wall 33 Inner skirt 34 Inclined bottom wall 33 Hanging leg 36 Upright leg 36

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-42432 (JP, A) Japanese Utility Model Application No. Sho 61-1332064 (JP, U) Japanese Utility Model Application No. Sho 63-107766 (JP, U) US Pat. , A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B05B 1/00-1/36 B05B 11/00-11/06

Claims (13)

(57) [Claims] 1. A hollow piston stem (12) reciprocating within a container closure (30) and having a single liquid discharge passage (16) through which liquid passes during pumping, and the hollow piston stem (12). 16) Plunger head (1) with a probe (18) mounted on top and extending laterally from said hollow piston stem (12)
4) and a nozzle cup (19) surrounding the probe (18). The nozzle cup (19) is provided with a discharge orifice (21) and a liquid to be discharged in communication with the discharge orifice (21). A rotating chamber (23) for imparting a predetermined speed of rotation to the liquid such that the liquid is discharged through the discharge orifice (21) as a fine spray having a predetermined outwardly expanding spray cone. Application means, wherein the plunger head (14) and the nozzle cup (19) are connected to the discharge orifice (21) from the liquid discharge passage (16) via the rotation applying means.
Flow openings (17, 2
2. A pump type sprayer comprising: 2, 24, 25), wherein the probe (18) is provided with the single liquid discharge passage (1).
6) and a through-hole (26) forming a second liquid flow path that directly connects the rotating chamber (23) to a part of the liquid from the single liquid discharge passage (16). 2. A pump-type sprayer characterized in that the liquid is divided into two liquid flow paths, and the predetermined rotational speed is reduced to generate a narrow-width spray cone having a smaller expansion width than the predetermined spray cone. . 2. The plunger head (14) is rotatable about its central axis with respect to the hollow piston stem (12), the outer end of the hollow piston stem (12). Depending on the relative rotation position of the plunger head (14), the probe through hole (26) can be exposed or closed by matching or detaching with the through hole (26) of the probe (18). At least 1
2. The method as claimed in claim 1, wherein the opening comprises two openings.
A pump-type sprayer as described. 3. The pump sprayer according to claim 2, wherein the opening (27) of the hollow piston stem (12) comprises a notch having a predetermined width. 4. The opening (27) of the hollow piston stem (12) gradually exposes the through hole (26) of the probe (18) by the rotation of the plunger head (14), and The pump-type sprayer according to claim 3, wherein the sprayer has a notch shaped so as to gradually adjust the length. 5. A rib (28) and a groove (2) between said hollow piston stem (12) and said container closure (30).
5. An interlocking means comprising: 9) preventing rotation of the hollow piston stem (12) accompanying rotation of the plunger head (14). The pump sprayer according to claim 1. 6. An interlocking means comprising a rib (28) and a lug (31) is provided between said plunger head (14) and said hollow piston stem (12) to provide said plunger head (14). Rotation of the hollow piston stem (12) and the probe through hole (26).
The pump type sprayer according to any one of claims 2 to 4, wherein the position of the pump type sprayer is limited to a position where the position is adjusted or removed. 7. A plunger head (14) having a first
And a limit stop means for limiting the reciprocating movement of the hollow piston stem (12) to control the discharge amount at a predetermined rotational position of the heplunger head (14). 5. The pump type sprayer according to any one of the above items 4. 8. A pump sprayer according to claim 7, wherein said first limit stop means comprises at least one depending leg (35) and contacts said container closure (30). 9. The reciprocating motion of the hollow piston stem (12) is provided by providing a second limit stop means to the container closure (30) and abutting the second limit stop means with the first limit stop means. The pump-type sprayer according to claim 7 or 8, characterized in that it is limited. 10. The container according to claim 9, wherein said second limit stop means comprises at least one vertical leg standing upright on said container closure.
A pump-type sprayer as described. 11. The interlocking means comprises a rib (28) and a groove (29) extending longitudinally on said hollow piston stem (12) and said container closure (30). A pump-type sprayer as described. 12. A lug (31) wherein said interlocking means extends radially over said plunger head (14).
7. A spray according to claim 6, comprising a rib (28) extending radially on said hollow piston stem. 13. The hollow piston stem (12) with the rotation of the plunger head (14) with the ribs (28) meshing with corresponding grooves (29) provided in the container closure (30). The pump type sprayer according to claim 12, wherein interlocking rotation of the pump is prevented.